JP2009252371A - Battery pack and external package case of battery pack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery pack that improves a capacity efficiency and reduce the number of components and provide an external package case of the battery pack. <P>SOLUTION: The battery pack 10 includes a nonaqueous electrolyte secondary battery 11 of which the negative electrode cell lead 12 and a positive electrode cell lead 13 are extruded, an external package case 30 for covering five surfaces excluding a second end surface 15 neighboring with a first end surface 14 in the nonaqueous electrolyte secondary battery 11, and a frame 32 for covering the second end surface 15. In the battery pack 10, a negative electrode terminal and a positive electrode terminal such as the negative electrode cell lead 12 and the positive electrode cell lead 13 or the like are led along a first adhesion margin 41 of the first end surface 14 and a second adhesion margin 42 of the second end surface 15 and are connected with an external power supply provided on a frame 32. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a battery pack in which a nonaqueous electrolyte secondary battery in which a negative electrode terminal and a positive electrode terminal are drawn out from an end face is accommodated in an exterior case, and an exterior case of a battery pack that accommodates a nonaqueous electrolyte secondary battery. .

  A battery pack used for a cellular phone or the like is a non-aqueous battery in which a battery element is covered with a laminate sheet so that a negative electrode terminal and a positive electrode terminal are exposed to the outside, and is formed into a substantially thin plate shape. An electrolyte secondary battery and an exterior case that accommodates the non-aqueous electrolyte secondary battery and exposes the negative electrode terminal and the positive electrode terminal are provided.

  The battery element includes a strip-shaped positive electrode in which a positive electrode active material layer is coated on a positive electrode current collector, a strip-shaped negative electrode in which a negative electrode active material layer is coated on a negative electrode current collector, and a separator interposed between the positive electrode and the negative electrode. And a positive electrode terminal provided on the positive electrode and a negative electrode terminal provided on the negative electrode.

A belt-like positive electrode, a negative electrode, and a separator are wound around a line along the width direction to form a battery element.
The positive electrode active material layer coated on the positive electrode current collector is a mixture of a positive electrode active material, a conductive agent, and a binder.
The negative electrode active material layer coated on the negative electrode current collector is a mixture of a negative electrode active material, a conductive agent, and a binder.

The outer case is a resin box that accommodates the nonaqueous electrolyte secondary battery and exposes the negative electrode terminal and the positive electrode terminal.
A non-aqueous electrolyte secondary battery is accommodated in the outer case to form a battery pack.
In recent years, a polymer battery pack employing a metal outer case has been adopted in order to achieve both improvement in strength against external impact and reduction in thickness (for example, see Patent Document 1).
JP 2007-184241 A

Patent Document 1 uses a member that covers both sides in the thickness direction of a nonaqueous electrolyte secondary battery with separate members and covers two end surfaces of the exterior case, and thus there is a restriction on a space in which the battery element in the battery pack is tightened. There is a problem that the volume efficiency is low and the number of parts is large.
In particular, Patent Document 1 has a structural problem in that the volume efficiency cannot be improved by the meshing portion because the exterior case meshes two portions (end surfaces).

  The present invention has been made to satisfy the above-described demand, and an object of the present invention is to provide a battery pack and an outer case of the battery pack that can improve volumetric efficiency and reduce the number of parts.

  In the battery pack of the present invention, the battery element is covered with a laminate sheet so that the negative electrode terminal and the positive electrode terminal are exposed to the outside, and is formed in a substantially thin plate shape, and the negative electrode terminal and the positive electrode terminal are drawn from the first end surface. A water electrolyte secondary battery, an exterior case that covers five surfaces other than the second end face adjacent to the first end face in the non-aqueous electrolyte secondary battery, and a frame that covers the second end face in the non-aqueous electrolyte secondary battery And at least one of the negative terminal and the positive terminal is along a first fusion margin formed on the first end surface and a second fusion margin formed on the second end surface It is routed and connected to an external power source provided in the frame.

At least one of the negative electrode terminal and the positive electrode terminal is routed along the first fusion allowance and the second fusion allowance.
Thereby, the contact terminal can be arranged on a desired end surface of the battery pack regardless of the first end surface which is a terminal drawing surface in the nonaqueous electrolyte secondary battery, and the design flexibility of the battery pack is improved.

Further, when routing at least one of the negative electrode terminal and the positive electrode terminal, a space corresponding to the first fusion allowance and the second fusion allowance, which has been left as a dead space in the past, is used.
Thereby, a design freedom can be improved, without inhibiting the volume efficiency of a nonaqueous electrolyte secondary battery.

  In the present invention, the frame is substantially L-shaped so as to cover the second end surface of the non-aqueous electrolyte secondary battery and the first end surface.

  By covering the second end face with the frame and covering the first end face, the routing route of at least one of the negative electrode terminal and the positive electrode terminal can be protected.

  Further, according to the present invention, the frame is substantially C-shaped so as to cover a third end surface opposite to the first end surface of the nonaqueous electrolyte secondary battery.

By covering the second end face with the frame and covering the first end face, the routing route of at least one of the negative electrode terminal and the positive electrode terminal can be protected.
In addition, the frame is configured to cover the first end surface and the third end surface opposite to the first end surface.
Thereby, the positioning of the nonaqueous electrolyte secondary battery can be performed by forming protrusions for guiding the outer case on the first end face and the third end face.

  In the present invention, the frame has a substantially frame shape surrounding the nonaqueous electrolyte secondary battery.

By covering the second end face with the frame and covering the first end face, the routing route of at least one of the negative electrode terminal and the positive electrode terminal can be protected.
In addition, the frame is configured to cover the first end surface and the third end surface opposite to the first end surface.
Thereby, the positioning of the nonaqueous electrolyte secondary battery can be performed by forming protrusions for guiding the outer case on the first end face and the third end face.

  Further, according to the present invention, a claw portion protruding toward the frame is provided in the exterior case.

By providing the outer case with the nail portion protruding toward the frame, the nail portion is embedded in the injected adhesive.
Thereby, a nail | claw part plays the role of an anchor and separation | separation with an exterior case and a flame | frame can be prevented.

  In the present invention, the frame is provided with a recess for accommodating the claw portion.

By providing the frame with a recess that accommodates the claw portion, the injected adhesive can be filled into the recess.
Thereby, a nail | claw part can be reliably embed | buried in the inject | poured adhesive agent and the anchor effect by a nail | claw part can be improved further.

  Furthermore, this invention has the collar part which protrudes toward the inner side of the said exterior case from the said frame, and the through-hole which penetrates the said collar part in the thickness direction is provided.

Therefore, the injected adhesive is filled in the through hole of the collar part, and the collar part can be securely fixed to the adhesive.
Thereby, a collar part plays the role of an anchor and separation of an exterior case and a frame can be prevented.

  An outer case of the battery pack of the present invention is an outer case of a battery pack that covers a substantially thin non-aqueous electrolyte secondary battery in which battery elements are covered with a laminate sheet, and bends a continuous plate member. Thus, the negative electrode terminal and the positive electrode terminal are formed in a box shape covering the five surfaces of the nonaqueous electrolyte secondary battery including the first end face of the nonaqueous electrolyte secondary battery from which the negative electrode terminal and the positive electrode terminal are drawn.

The outer case was formed in a box shape so as to cover the five faces of the nonaqueous electrolyte secondary battery (including the first end face from which the negative electrode terminal and the positive electrode terminal were drawn).
By forming the outer case in a box shape, volume efficiency is improved because there is no meshing portion in the outer case.
By bending the continuous plate-shaped member to form the outer case in a box shape, the number of parts can be reduced, and the thickness can be reduced with respect to the squeezing process, and the cost can be reduced.

  Furthermore, the present invention is provided with a claw portion that protrudes toward the inner surface.

By providing the outer case with a claw portion that protrudes toward the inner surface, the claw portion is embedded in the injected adhesive.
Thereby, a nail | claw part plays the role of an anchor and separation | separation with an exterior case and a flame | frame can be prevented.

  In the present invention, a slit is formed along the insertion direction of the non-aqueous electrolyte secondary battery.

  By forming a slit along the insertion direction of the nonaqueous electrolyte secondary battery in the outer case, the nonaqueous electrolyte secondary battery 11 can be used by using the slit when the nonaqueous electrolyte secondary battery 11 is accommodated in the frame 32. The secondary battery and the outer case can be positioned.

  Further, according to the present invention, a folded portion is provided in an insertion opening for inserting the nonaqueous electrolyte secondary battery.

By providing the folded portion in the insertion opening of the outer case, the folded portion is embedded in the injected adhesive.
Thereby, the folding | turning part plays the role of an anchor and separation | separation with an exterior case and a flame | frame can be prevented.

  Moreover, the injection | pouring part for inject | pouring an adhesive agent inside is provided in this invention.

  By providing an injection part for injecting the adhesive inside, the adhesive can be injected well.

According to the battery pack of the present invention, the contact terminal can be arranged on a desired end surface by drawing at least one of the negative electrode terminal and the positive electrode terminal along the first fusion margin and the second fusion margin. This has the effect of improving the design freedom of the pack.
In addition, the space corresponding to the first fusion allowance and the second fusion allowance can be routed, and the design flexibility can be improved without hindering the volume efficiency of the nonaqueous electrolyte secondary battery. Has an effect.

In addition, according to the battery pack outer case of the present invention, forming the outer case in a box shape has an effect of improving volumetric efficiency because the outer case has no meshing portion.
In addition, it is possible to reduce the number of parts by bending a continuous plate-like member and forming the outer case in a box shape. Has an effect.

Hereinafter, a battery pack and an outer case of the battery pack according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 2, the battery pack 10 according to the first embodiment is a substantially thin plate-like non-plate having a first end face 14 from which a negative electrode cell lead (negative electrode terminal) 12 and a positive electrode cell lead (positive electrode terminal) 13 are drawn. A first printed circuit board (negative / positive electrode terminal) 25 connected to the water electrolyte secondary battery 11 through a negative electrode relay tab (negative electrode terminal) 22 and a positive electrode relay tab (positive electrode terminal) 23 to the negative electrode cell lead 12 and the positive electrode cell lead 13. And the second printed circuit board (negative electrode terminal) 26 interposed between the negative electrode cell lead 12 and the negative electrode relay tab 22 and the fifth surface 14 other than the second end surface 15 adjacent to the first end surface 14 in the nonaqueous electrolyte secondary battery 11. , 16 to 19, a frame 32 that covers the second end face 15 of the nonaqueous electrolyte secondary battery 11, and a label that covers the exterior case 30 and the frame 32. And a 34.

As shown in FIG. 2, in the nonaqueous electrolyte secondary battery 11, a battery element 36 is covered with a laminate sheet 37 so that the negative electrode cell lead 12 and the positive electrode cell lead 13 are exposed to the outside.
The nonaqueous electrolyte secondary battery 11 includes a first end surface 14 from which the negatively exposed negative electrode lead 12 and positive electrode cell lead 13 are drawn, a second end surface 15 adjacent to the first end surface 14, a first end surface 14, and a second end surface 15. The other four surfaces 16 to 19 are formed in a substantially thin plate shape.
The nonaqueous electrolyte secondary battery 11 has a first fusion allowance 41 formed on the first end face 14 and a second fusion allowance 42 formed on the second end face 15.

The negative electrode cell lead 12 and the positive electrode cell lead 13 drawn out from the first end face 14 are connected to the first printed circuit board 25 via the negative electrode relay tab 22 and the positive electrode relay tab 23.
A second printed circuit board 26 is interposed between the negative electrode cell lead 12 and the negative electrode relay tab 22.

The negative electrode cell lead 12, the positive electrode cell lead 13, the negative electrode relay tab 22, the positive electrode relay tab 23, the first printed circuit board 25, and the second printed circuit board 26 include a first fusion margin 41 formed on the first end surface 14, and a second end surface. 15 is routed along the second fusion allowance 42 formed in 15.
Thus, the contact terminals can be arranged on the desired end surface 15 of the battery pack 10 regardless of the first end surface 14 that is the lead surface of the negative electrode cell lead 12 and the positive electrode cell lead 13 in the nonaqueous electrolyte secondary battery. Design freedom is improved.
The positive electrode 53 and the negative electrode 54 of the first printed circuit board 25 routed along the second fusion allowance 42 are connected to an external power source (not shown) provided on the frame 32.

Further, as shown in FIG. 4, the nonaqueous electrolyte secondary battery 11 folds the positive electrode cell lead 13 and the negative electrode cell lead 12 along the first fusion margin 41 and along the first end surface 14.
In this state, the positive electrode cell lead 13, the negative electrode cell lead 12, and the second printed circuit board 26 are arranged in a space (so-called terrace) 44 formed by the first fusion allowance 41 and the first end surface 14.
The space 44 is a dead space not conventionally used. Therefore, by disposing the positive electrode cell lead 13, the negative electrode cell lead 12, and the second printed circuit board 26 in the space 44, the degree of freedom in design can be improved without hindering the volume efficiency of the battery.

As shown in FIG. 2, the nonaqueous electrolyte secondary battery 11 has a protective tape 46 bonded to the second end surface 15 and the fourth end surface 17, and a double-sided tape 47 to the fifth end surface 18 and the sixth end surface 19, respectively. Is glued.
The double-sided tape 47 is a tape for bonding the fifth end surface 18 and the sixth end surface 19 to the exterior case 30.

As shown in FIG. 2, the first printed circuit board 25 has a positive electrode protrusion 51 and a negative electrode protrusion 52 protruding inward from the back surface, connected to the positive electrode protrusion 51, the positive electrode 53 is exposed on the surface 25 </ b> A, and the negative electrode protrusion 52. The negative electrode 54 is exposed on the surface 25A.
The positive electrode 53 is connected to the positive electrode cell lead 13 through the positive electrode relay tab 23.
The negative electrode 54 is connected to the negative electrode cell lead 12 via the negative electrode relay tab 22.

  Further, as shown in FIGS. 5A and 5B, the second fusion allowance 42 of the nonaqueous electrolyte secondary battery 11 is bent so as to be in contact with the second end surface 15 and faces the second fusion allowance 42. Thus, the first printed circuit board 25 is arranged.

As shown in FIGS. 2 and 3, the outer case 30 is made of metal (aluminum, steel material) that covers the five surfaces 14, 16 to 19 other than the second end surface 15 adjacent to the first end surface 14 in the nonaqueous electrolyte secondary battery 11. Etc.).
The exterior case 30 is formed into a box-like substantially rectangular body by folding a continuous plate-like member in half, and includes a first wall portion 38 facing the first side wall 71 of the frame 32, and a third side wall of the frame 32. The third wall portion 39 is opposed to the third wall portion 39.

By forming the outer case 30 in a box shape, the outer case 30 has no meshing portion, so that the volume efficiency is improved.
Further, by bending the continuous plate-like member to form the outer case 30 in a box shape, the number of parts can be reduced, and the thickness can be reduced with respect to the squeezing process, and the cost can be reduced.

  The outer case 30 is provided with an insertion opening 56 for inserting the nonaqueous electrolyte secondary battery 11 and a claw portion 57 (see FIG. 6B) protruding toward the frame 32 (toward the inner surface). A slit 58 (see FIG. 4) along the insertion direction of the nonaqueous electrolyte secondary battery 11 is formed in the first end surface 14 and the third end surface 16, a folded portion 61 is provided in the insertion opening 56, and an adhesive 63 is provided inside. An injection portion 62 for injecting (see FIG. 5B) is provided.

As shown in FIGS. 6A and 6B, the pair of upper and lower claws 57 are provided at the end of the insertion opening 56 in the first wall portion 38, and the insertion opening 56 in the third wall portion 39. A pair of upper and lower sides is provided at the end of the.
The claw portion 57 is provided so as to protrude from the outer case 30 toward the inner surface. Therefore, the claw portion 57 is embedded in the injected adhesive 63 (FIGS. 5A and 5B).
Thereby, the nail | claw part 57 plays the role of an anchor and separation | separation with the exterior case 30 and the flame | frame 32 can be prevented.

As shown in FIGS. 2 and 4, the slits 58 are respectively provided in the first wall portion 38 and the third wall portion 39 along the insertion direction of the nonaqueous electrolyte secondary battery.
The slit 58 is a part that performs positioning by fitting into a protrusion 65 of the frame 32 described later.

As shown in FIGS. 5A and 5B, the folded portion 61 is provided inward in the insertion opening 56. Therefore, the folded portion 61 is embedded in the injected adhesive 63.
Thereby, the folding | returning part 61 plays the role of an anchor and separation | separation with the exterior case 30 and the flame | frame 32 can be prevented.

As shown in FIG. 2, the frame 32 is formed in a substantially frame shape with a first side wall 71, a second side wall 72, a third side wall 73, and a fourth side wall 74 so as to surround the nonaqueous electrolyte secondary battery 11. Yes.
The frame 32 covers the second end surface 15 with the second side wall 72, covers the first end surface 14 with the first side wall 71, covers the third end surface 16 opposite to the first end surface 14 with the third side wall 73, The fourth side wall 74 covers the fourth end surface 17.
The second side wall 72 is a wall portion exposed to the outside in a state of being accommodated in the outer case 30 and has an external power source (not shown).

  The frame 32 is provided with a recess 76 (see FIGS. 6A and 6B) that accommodates the claw portion 57 of the exterior case 30, and a flange portion 77 (see FIG. 7) that protrudes toward the inside of the exterior case 30. ) And a through-hole 78 (see FIG. 7) penetrating the flange 77 in the thickness direction is provided.

By providing the recess 76 that accommodates the claw portion 57 of the outer case 30, the injected adhesive 63 can be filled in the recess 76.
Thereby, the nail | claw part 57 can be reliably embed | buried in the inject | poured adhesive 63, and the anchor effect by the nail | claw part 57 can be improved further.

As shown in FIG. 7, a flange 77 (see also FIG. 5B) protruding toward the inside of the outer case 30 is provided, and a through hole 78 (FIG. 5B) penetrating the flange 77 in the thickness direction. ) Is also provided.
Therefore, the injected adhesive 63 is filled in the through hole 78 of the flange portion 77, and the flange portion 77 can be reliably fixed to the adhesive 63.
Thereby, the collar part 77 plays the role of an anchor, and the separation between the outer case 30 and the frame 32 can be prevented.

Further, as shown in FIG. 4, the frame 32 is provided with projections 65 that fit into the slits 58 of the exterior case 30 on the first side wall 71 and the third side wall 73, respectively.
Therefore, when the nonaqueous electrolyte secondary battery 11 is accommodated in the frame 32, the nonaqueous electrolyte secondary battery 11 and the outer case 30 can be positioned by fitting the slits 58 into the protrusions 65.
As shown in FIG. 2, a submergence detection seal 79 is provided on the second side wall 72 of the frame 32.

  As shown in FIG. 8, the label 34 has a pressure-sensitive adhesive (matrix) 82 laminated on the surface of the silicon-impregnated release paper 81, a BPET 83 laminated on the surface of the pressure-sensitive adhesive 82, and an ink adhesive 84 laminated on the surface of the BPET 83. The ink 85 is laminated on the surface of the ink adhesive 84, and the UV coating 86 is laminated on the surface of the ink 85.

Next, the process of assembling the battery pack 10 will be described with reference to FIGS.
First, as shown in FIG. 9A, one end 22A of the negative electrode relay tab 22 is welded to the negative electrode protrusion 52 (see FIG. 2) of the first printed circuit board 25.
As shown in FIG. 9B, one end portion 23A of the positive electrode relay tab 23 is welded to the positive electrode protrusion 51 (see FIG. 2) of the first printed board 25.
As shown in FIG. 9C, the second printed circuit board 26 is welded to the negative electrode cell lead 12 of the nonaqueous electrolyte secondary battery 11.

As shown in FIG. 10A, the negative electrode cell lead 12 is bent approximately 90 ° upward. Next, the other end portion 23 </ b> B of the positive electrode relay tab 23 is caulked to the positive electrode cell lead 13.
Since the negative electrode cell lead 12 is bent upward by approximately 90 °, the positive electrode cell lead 13 can be prevented from contacting the negative electrode cell lead 12.

As shown in FIG. 10B, the negative electrode cell lead 12 is returned to its original position, and the negative electrode relay tab 22 is bent in the direction of arrow A to the second printed circuit board 26.
The bent other end portion 22B of the negative electrode relay tab 22 is welded to the second printed circuit board 26. After welding, a tape (not shown) for preventing short circuit is applied.

Next, the first printed circuit board 25 is bent in the arrow B direction.
Further, as shown in FIG. 10C, the positive electrode cell lead 13 and the negative electrode cell lead 12 are folded along the first fusion margin 41 and along the first end face 14.
In this state, the first printed circuit board 25 is disposed along the second end surface 15 (see FIG. 10B).
The positive electrode 53 and the negative electrode 54 are exposed on the surface 25 </ b> A of the first printed board 25.

As shown in FIG. 11A, the nonaqueous electrolyte secondary battery 11 is accommodated in the frame 32 as indicated by an arrow C.
In this state, the positive electrode 53 and the negative electrode 54 of the first printed circuit board 25 are exposed to the outside from the positive electrode opening 91 and the negative electrode opening 92 of the frame 32.

As shown in FIG. 11B, the outer case 30 is fitted in the direction of the arrow D in the nonaqueous electrolyte secondary battery 11 accommodated in the frame 32.
Here, protrusions 65 are provided on the first side wall 71 and the third side wall 73 of the frame 32, respectively.

On the other hand, the first wall portion 38 and the third wall portion 39 of the outer case 30 are provided with slits 58 along the insertion direction of the nonaqueous electrolyte secondary battery.
Therefore, when the nonaqueous electrolyte secondary battery 11 (that is, the frame 32) is accommodated in the exterior case 30, the nonaqueous electrolyte secondary battery 11 (that is, the frame 32) is fitted by fitting the slit 58 to the protrusion 65. ) And the outer case 30 can be positioned.

As shown in FIG. 11C, the second side wall 72 of the frame 32 is exposed to the outside in a state where the outer case 30 is fitted in the nonaqueous electrolyte secondary battery 11 (that is, the frame 32).
Therefore, the positive electrode 53 and the negative electrode 54 of the first printed circuit board 25 are exposed to the outside from the positive electrode opening 91 and the negative electrode opening 92 of the frame 32.

An adhesive 63 (see FIG. 5B) is injected into the battery pack 10 from the injection portion 62 of the outer case 30.
Similarly, as shown in FIG. 12A, the adhesive 63 (see FIG. 5B) is injected into the battery pack 10 from the injection portion 64 of the outer case 30.
By providing the injection parts 62 and 64 in the outer case 30, the adhesive 63 can be injected well inside.

  As shown in FIGS. 12B and 12C, the label 34 is wound around the entire surface of the outer case 30 to complete the assembly of the battery pack 10.

  Next, the battery packs of the second to fourth embodiments will be described based on the schematic diagrams of FIGS. In addition, in the battery pack of 2nd-4th embodiment, the same code | symbol is attached | subjected about the same similar member as the battery pack 10 of 1st Embodiment, and description is abbreviate | omitted.

(Second Embodiment)
A battery pack 100 of the second embodiment shown in FIG. 13 is provided with a frame 102 instead of the frame 32 of the first embodiment, and other configurations are the same as the battery pack 10 of the first embodiment.
The frame 102 is formed in a substantially I shape so as to cover the second end face 15 (specifically, the first printed circuit board 25) of the nonaqueous electrolyte secondary battery 11.

By covering the second end surface 15 (specifically, the first printed circuit board 25) with the frame 102, the routing route of at least one of the negative electrode terminal and the positive electrode terminal can be protected.
That is, according to the battery pack 100 of 2nd Embodiment, the effect similar to the battery pack 10 of 1st Embodiment is acquired.
The exterior case 30 can be formed by squeezing in addition to bending a continuous plate-like member.

(Third embodiment)
The battery pack 110 according to the third embodiment shown in FIG. 14 is provided with a frame 112 instead of the frame 32 according to the first embodiment, and other configurations are the same as those of the battery pack 10 according to the first embodiment.
The frame 112 is formed in a substantially L shape so as to cover the second end face 15 (specifically, the first printed circuit board 25) of the nonaqueous electrolyte secondary battery 11 and the first end face 14.

By covering the second end face 15 (specifically, the first printed circuit board 25) with the frame 112 and covering the first end face 14, the routing route of at least one of the negative terminal and the positive terminal can be protected.
That is, according to the battery pack 110 of 3rd Embodiment, the effect similar to the battery pack 10 of 1st Embodiment is acquired.
The exterior case 30 can be formed by squeezing in addition to bending a continuous plate-like member.

(Fourth embodiment)
The battery pack 120 of the fourth embodiment shown in FIG. 15 is provided with a frame 122 instead of the frame 32 of the first embodiment, and other configurations are the same as the battery pack 10 of the first embodiment.
The frame 122 covers the second end face 15 (specifically, the first printed circuit board 25) of the nonaqueous electrolyte secondary battery 11, covers the first end face 14, and further, the third end face 16 on the side opposite to the first end face 14. It is formed in a substantially C shape so as to cover.

By covering the second end face 15 (specifically, the first printed circuit board 25) with the frame 122 and covering the first end face 14, the routing path of at least one of the negative terminal and the positive terminal can be protected.
In addition, by covering the first end surface 14 and the third end surface 16, the projections 65 can be provided on the first side wall 71 and the third side wall 73.
Therefore, positioning can be performed by fitting the slit 58 of the outer case 30 to the protrusion 65.

That is, according to the battery pack 120 of 4th Embodiment, the effect similar to the battery pack 10 of 1st Embodiment is acquired.
The exterior case 30 can be formed by squeezing in addition to bending a continuous plate-like member.

  In the above-described embodiment, a metal case is exemplified as the outer case 30. However, the present invention is not limited to this, and the outer case 30 may be formed of a resin.

  Moreover, although the said embodiment demonstrated the example which routes both a negative electrode terminal and a positive electrode terminal, it is not restricted to this, At least one terminal of a negative electrode terminal and a positive electrode terminal can also be routed.

  INDUSTRIAL APPLICABILITY The present invention is applied to a battery pack in which a nonaqueous electrolyte secondary battery in which a negative electrode terminal and a positive electrode terminal are pulled out from an end surface is accommodated in an exterior case, and an exterior case of a battery pack that accommodates a nonaqueous electrolyte secondary battery. Is preferred.

(A) is a perspective view which shows the state which looked at 1st Embodiment of the battery pack which concerns on this invention from upper direction, (B) is a perspective view which shows the state which looked at the battery pack of 1st Embodiment from the downward direction. It is a disassembled perspective view of the battery pack which concerns on 1st Embodiment. (A) is a perspective view which shows the state which looked at the exterior case of the battery pack which concerns on 1st Embodiment from the insertion opening side, (B) is the state which looked at the exterior case of the battery pack which concerns on 1st Embodiment from the back side. FIG. It is the sectional view on the AA line of FIG. (A) is the BB sectional drawing of FIG. 1, (B) is the C section enlarged view of FIG. 5 (A). (A) is a perspective view which shows the state before fitting the exterior case of the battery pack which concerns on 1st Embodiment, (B) is the D section enlarged view of (A). It is a perspective view which shows the collar part and through-hole of the battery pack which concern on 1st Embodiment. It is sectional drawing which shows the label of the battery pack which concerns on 1st Embodiment. (A)-(C) are perspective views explaining the process of welding a 1st printed circuit board to the negative electrode cell lead and positive electrode cell lead of the battery pack which concerns on 1st Embodiment. (A)-(C) are perspective views explaining the process of arrange | positioning the 1st printed circuit board of the battery pack which concerns on 1st Embodiment on a 2nd end surface. (A)-(C) is a perspective view explaining the process of accommodating the nonaqueous electrolyte secondary battery of the battery pack which concerns on 1st Embodiment in an exterior case. (A)-(C) are perspective views explaining the process of covering the exterior case of the battery pack which concerns on 1st Embodiment with a label. It is a disassembled perspective view which shows 2nd Embodiment of the battery pack which concerns on this invention. It is a disassembled perspective view which shows 3rd Embodiment of the battery pack which concerns on this invention. It is a disassembled perspective view which shows 4th Embodiment of the battery pack which concerns on this invention.

Explanation of symbols

10, 100, 110, 120 Battery pack 11 Nonaqueous electrolyte secondary battery 12 Negative electrode cell lead (negative electrode terminal)
13 Positive cell lead (positive terminal)
14 1st end surface 14, 16-19 5th surface 15 2nd end surface 16 3rd end surface 22 Negative electrode relay tab (negative electrode terminal)
23 Positive relay tab (positive terminal)
25 1st printed circuit board (negative / positive terminal)
26 Second printed circuit board (negative electrode terminal)
30 Outer case 32, 102, 112, 122 Frame 36 Battery element 37 Laminate sheet 41 First fusion allowance 42 Second fusion allowance 56 Insertion opening 57 Claw part 58 Slit 61 Folding part 63 Adhesive 62 Injection part 76 Concave part 77 鍔Part 78 Through hole

Claims (12)

A non-aqueous electrolyte secondary battery in which the battery element is covered with a laminate sheet so that the negative electrode terminal and the positive electrode terminal are exposed to the outside and is formed in a substantially thin plate shape, and the negative electrode terminal and the positive electrode terminal are drawn from a first end surface;
An exterior case covering five surfaces other than the second end surface adjacent to the first end surface in the non-aqueous electrolyte secondary battery;
A frame that covers the second end face of the non-aqueous electrolyte secondary battery;
At least one of the negative electrode terminal and the positive electrode terminal is routed along a first fusion allowance formed on the first end face and a second fusion allowance formed on the second end face, A battery pack connected to an external power source provided in the frame.   2. The battery pack according to claim 1, wherein the frame has a substantially L shape that covers the second end face of the nonaqueous electrolyte secondary battery and covers the first end face.   3. The battery pack according to claim 2, wherein the frame has a substantially C shape covering a third end surface opposite to the first end surface of the non-aqueous electrolyte secondary battery.   The battery pack according to claim 3, wherein the frame has a substantially frame shape surrounding the nonaqueous electrolyte secondary battery.   The battery pack according to claim 1, wherein a claw portion protruding toward the frame is provided in the exterior case.   The battery pack according to claim 1, wherein a concave portion that accommodates the claw portion is provided in the frame.   The battery pack according to claim 1, wherein the battery pack has a flange portion protruding from the frame toward the inside of the exterior case, and is provided with a through-hole penetrating the flange portion in the thickness direction. An outer case of a battery pack that covers a substantially thin non-aqueous electrolyte secondary battery in which a battery element is covered with a laminate sheet,
By bending a continuous plate-like member, a negative electrode terminal and a positive electrode terminal are formed in a box shape covering the five surfaces of the nonaqueous electrolyte secondary battery including the first end face in the nonaqueous electrolyte secondary battery drawn out. Battery pack outer case.   The battery pack outer case according to claim 8, wherein a claw portion protruding toward the inner surface is provided.   The battery pack outer case according to claim 8 or 9, wherein a slit is formed along an insertion direction of the non-aqueous electrolyte secondary battery.   The battery pack outer case according to any one of claims 8 to 10, wherein a folded portion is provided in an insertion opening into which the nonaqueous electrolyte secondary battery is inserted.   The battery pack outer case according to claim 8, wherein an injection portion for injecting an adhesive is provided therein.

Images